Anvil cloud

Cumulonimbus incus
Cumulonimbus capillatus incus
Abbreviation Cb inc.
Genus Cumulonimbus (heap, cloud/severe rain)
Species Incus (anvil)
Classification Family D (Vertically developed)
Appearance Large flat-top cloud
Precipitation cloud? Yes, often intense

A cumulonimbus incus (Latin incus, "anvil") is a cumulonimbus cloud which has reached the level of stratospheric stability and has formed the characteristic flat, anvil-top shape. They can form into supercells resulting in severe storm phenomena such as tornadoes.

A cumulonimbus incus is a sub-form of cumulonimbus capillatus.

Hazards

A cumulonimbus incus is a mature thunderstorm cloud and can produce many dangerous elements.

  • Lightning; this storm cloud is capable of producing bursts of cloud to ground lightning.
  • Hail; hailstones may fall from this cloud.
  • Heavy rain; the cloud may drop several inches of rain in a short amount of time. This could cause flash flooding
  • Strong wind; gale force winds from a downburst may occur under this cloud.

Classification

This is a powerful cumulonimbus cloud. If the correct atmospheric conditions are met, they can grow into a supercell storm. This cloud may be a single-cell storm or it may be one cell in a multi-cell storm. They are capable of producing severe storm conditions for a short amount of time.

fr:Cumulonimbus#Cumulonimbus capillatus et incus
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